In the UK and the EU it's against the law to label oat milk / vegan cheese / cream etc as milk, cheese or cream (or other dairy words) because those terms have legal definitions. The things made from plants don't meet those definitions. It's why when you buy a block of cheese it says 'ingredients: cheese' not 'milk, salt and bacteria'.
That's why things like oatly say 'oat drink' on the packaging.
Personally I like oat milk, but I also like cheese. And rapeseed oil is evil stuff, it kills wild bees that rely on their own honey to survive the winter. They prefer oilseed rape flowers above all others, but the honey they make from it crystallises in winter and then they starve to death.
I have nothing against vegan or vegetarian alternatives, quite like a lot of them, but saying one thing is cruel and another not is not necessarily true. Quite often animals, sometimes big ones like baby deer, pheasants, pet cats, are caught by the combine harvester when they hide from the big noisy machine in the crop field and are killed in horriffic ways. Small animals like mice and small birds are killed in their 100s and 1000s in every field. Literally nothing is vegan.